Filter.



No. 893,806. PATENTED JULY 21, 1908.

0. H. LOEW.

FILTER. I APPLICATION FILED APR. 16,1906.

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PATENTED JULY 21, 1908. O. H. LOEW.

FILTER.

APPLICATION FILED APR.16,1906.

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4a Attj 0.11. NEW. FILTER.

APPLICATION FILED APR. 16,1906.

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No.893,806. PATENTED JULY 21, 1908.

0. H. LOBW. FILTER.

APPLICATION FILED APR-16,1906.

4 SHEETS-SHEET 4.

Attesw M t: Invenfor:

CHARLES H. LOEW, OF LAKEWOOD, OHIO.

FILTER.

Specification of Letters Patent.

Patented July 21, 1908.

Application filed April 16, 1906. Serial No. 311,880.

To all whom it may concern:

Be it known that I, CHARLES H. LOEW, a

citizen of the United States, residing at Lakewood, in the county of Ouyahoga and State of Ohio, have invented certain new and useful Improvements in Filters, of which the following is a specification.

This invention relates to filters designed to be used chiefly in the clarifying of liquids containing gas in solution, like beer.

By a requirement of the Patent Office, this application is restricted to the press of the filter and its adjacent parts and the other parts of the apparatus and especially the filter element formed by the press apparatus and formed with indentations and ridges necessarily described and not claimed herein are made the subject matter of other applications for Letters Patent.

Figure 1 is a rear elevation of a filter embodying my invention; Fig. 2 is a side elevation of the upper portion thereof showing the press raised away from the filter casing with the cover of the casing in place; Fig.3 is a top plan view of the filter with the cover removed ,,and showing the press in position above the filtering elements; Fig. 4 is a view on a smaller scale of the apparatus showing the press in a horizontal position, the cover not being shown; Fig. 5 is a detail of the press rack guard and its stop; Fig. 6 is a detail of the press rack wheel pawl; Fig. 7 is a front elevation of the filling rim; Fig. 8 is a vertical central section of the filter casing showing the position of the press when acting against the filtering elements, and Fig. 9 is a view similar to Fig. 8 showing the press removed.

Generally speaking, the filter apparatus comprises a main frame adapted to support the filter which consists of a casing contaming suitable filtering elements, a cover for sealing the casing when it has been filled,

proper inlet and outlet conduits and sundry devices useful in manipulating the filtering elements, including a press for squeezing the superfluous water from the wood pulp used as a filtering medium.

In the drawings, 10 is a casing which is preferably made of brass or other non-corrodible metal, is circular in cross section, open at the top and closed at the bottom. At each side it is provided with trunnions which are adapted to rotate in bearings 204 provided in the main frame of the apparatus.

Within the casing 10 is placed a crib 12 of woven wire smaller in diameter than the casing, so that an annular space 121 is formed between them. At the center of the casing is placed a second crib 13 of much smaller diameter than the crib 12. In the space between the two cribs are arranged the filtering elements consisting of a mass of wood pulp 122 in which are embedded inlet conductors 123 touching the outer crib 12 and not the inner crib 13, and outlet conductors 133 touching the inner crib 13 and placed open-work plate made of woven wire or the like which permits the free lateral passage of the liquid. On each side of each plate are arranged protecting screens of fine woven wire or cloth.

The casing 10 has an upper rim 14 of heavy metal provided with projecting lugs 140, having threaded eye-holes 141 adapted to receive tightening screws 164 of the cover 16 and which tightening screws are rotated into position by hand-wheels 165 The cover 16 comprises a heavy plate 160 connected by a ball and socket joint with a hinged bracket 17 so that the cover may be swung out of the way of the press when it is desired to use the latter.

The main frame 20 comprises uprights 200 and 201 connected together at the bottom by '200 is provided with a bracket for supporting the gearing which operates the filter press, the upright 201. is provided with a bracket which supports the hinge of the cover.

The shaft 206 is actuated by a multiplying gear which consists, first, of a hand wheel 18, rotated by a handle 180 and which in turn rotates a shaft 181 mounted in bearings 182 on a bracket 209. The shaft 181 has a toothed wheel 183 secured to it and is also provided with a pinion 184 meshing with the gear 185 much larger in diameter than the pinion, and which gear is secured to and rotates with the shaft 206. Swung from the bracket 209 is a pawl 186 having a handle 187 and which pawl is adapted to engage with the teeth of the ratchet wheel 183.

The press 19 is mounted between the uprights 200 and 201. The shaft 206 is provided with gears 190 which are held in constant mesh with long rack bars 191 at the end of which the press plate 19 is carried. Guide plates 192 are mounted to rotate on each side of the gears 190. In contact with the rear surface of each rack bar are rollers 193 mounted on shafts or pins 194 which connect the guide plates 192 at their outer extremities. The outermost one of each pair of plates 192 is extended downward and outward to form a long tongue 195 which is provided at its extremity with an adjustable tip 196 adapted to strike against the cross bar 205. The adjustment of this tip determines the point to which the rack bars 191 can swing in that direction.

The press 19 comprises a plate 197 provided with reinforcing ribs 198 and a lower perforated surface 199 constituting a drainage plate. A press ring 90 is centrally secured to or made integral with the press plate 199. It comprises two annular flanges 91 and 92 between which is an annular groove 93, so that when the pulp has been compressed (as best shown in Fig. 9) it leaves two annular grooves 98 and 99 therein, which being filled with the fresh pulp, assists in felting or matting the particles together to form a seal the better to prevent the escape of the fluid to be filtered.

The cylinder 210 of woven wire and provided externally with spacing lugs 211, and which cylinder is identical in diameter with the crib 12, is used in filling the casing above the uppermost conductor 133 with the filter mass.

After the filter has been emptied and cleansed, it is prepared for another use by placing the filtering elements therein. A

ayer of wood pulp is then placed at the bot tom of the casing between the cribs and the first of the outlet conductors is put in place. The press 19 is then brought into operation to compress the layers of wood pulp into compact form. To that end the wheel 18 is rotated and by means of the gearing connected therewith and with the shaft 206 in connection with the pinions mounted thereon and the rack bar 'of the press, the latter is lowered within the casing to be brought into contact with the upper surface of the layer of wood pulp. A further rotation of the wheel 18 serves, through its connections, to lower the press, to compress the pulp and squeeze the Water out of it. The press ring 90 forms the two grooves 98 and 99 in the compressed pulp. When a sufficient compression has thus taken place the pawl 186 is allowed to engage with the teeth of the edge of the ratchet wheel on the shaft 181. The wet pulp has a tendency to swell and the function of this pawl is to hold the gearing, and consequently the press, rigid and prevent tained therein and a press adapted to be any backward or upward movement of the press While a fresh layer of Wood pulp is being prepared and while the water is exuding from the compressed mass. The pawl 186 holds the gearing and the. press rigid. In substantially the same manner all of the filtering elements are placed within the casing. The press may be used when one, two, three or even more elements have been inserted, de ending upon the thickness of the wood pu p layers and the degree of density sought to be obtained. When the last outlet conductor has been placed in position, the filling cylinder 210 is then placed in position and filled with pulp. The press ring 90 is then removed and the press brought down to compress it into shape after which the upper plate is placed in position and the cover secured to the casing.

In Fig. 5 there is illustrated the means employed to prevent the press from swinging over and inadvertently striking the workmen While the press is out of the filter, for instance, when the casing is being cleansed. When the press would tend to swing too far the tongue 195 strikes against the connecting rod 205 and prevents its further movement, as has been heretofore described. The screw tip 196 permits of a slight adjustment which enables the workmen to vary the position at which the piece 195 will stop.

\ What I claim as new is 1. In an apparatus of the class described,

comprising a casing, filtering elements conmoved to contact with said filtering elements,

a bar secured to said press whereby it may be moved, means for moving the bar, a shaft around which said bar may swing, a stop arranged near to said shaft, and means adapted, to swing on said shaft simultaneously with the bar and to contact with the said stop to limit the extent of the swing of the bar.

2. In an apparatus of the class described, comprising a casing, filtering elements contained therein and a press adapted to be moved to contact with said filtering elements,

a bar secured to said press whereby it may be moved, means for moving the bar, a shaft around which said bar may swing, a stop arranged near to said shaft and means adapted to swing on said shaft simultaneously with the bar and to contact with the said stop to limit the extent of the swing of the bar, con sisting of a plate pivoted on the shaft, means 0 for holding it in constant relation to the bar on one side and a tongue on the other side so adjusted as to length that in its oscillation it will strike the stop at one point in its circular ath. p 3. In an apparatus of the class described, comprising a casing, filtering elements contained therein and a ress ada ted to be moved to contact wit said fi tering elements, a bar secured to said press whereby it 0 may be moved, means for moving the bar, a shaft around which said bar may swing, a stop arranged near to said shaft and means ada ted to swing on said shaft simultaneous y with the bar and to contact with the said stop to limit the extent of the swing of the bar, consisting of a plate ivoted on the shaft, a roller pivoted on the p ate in contact with the bar and a tongue secured to or formed integral with the plate and long enofigh to reach the stop at one point in its pat 4. In an apparatus of the class described, comprising a casing, filtering elements contained therein and a press adapted to be moved to contact with said filtering elements, a bar secured to said press whereby it may be moved, means for moving the bar, a shaft around which said bar may swing, a stop arranged near to said shaft and means ada ted to swing. on said shaft simultaneous y with the bar and to contact with the said stop to limit the extent of the swing of the bar, consisting of a plate pivoted to the shaft, a roller pivoted to the plate and in contact with the bar and a tongue secured to or formed integral with the plate and provided with means for varying the effective length of the tongue.

5. In an apparatus of-the class described,

comprising a casing, filtering elements contained therein and a press adapted to be moved to contact with said filtering elements, a bar secured to said press whereby it may be moved, means for moving the bar, a shaft around which said bar may swing, a stop'arranged near to said shaft and means adapted to swing on said shaft simultaneously with the bar andto contact with the said stop to limit the extent of the swing of the bar, consisting of a plate pivoted to the shaft, a roller pivoted to the plate and in contact with the bar and a tongue secured to or formed integral with the plate and rovided with means for varying the effective ength of the tongue, comprising a screw projecting therefrom and means for rotating 1t.

6. In an apparatus of the class described, comprising a casing, filtering elements contained therein and a press adapted to be moved to contact with said filtering elements and actuated by rack bars meshing with gearing mounted upon a shaft in the frame of the machine and arranged to oscillate on said shaft, a cross bar, and means for limiting the extent of the oscillation of the rack bars around said shaft, consisting of a plate, adapted to swing simultaneously on said shaft with said rack bars and provided with a tongue which will strike against the cross bar at one point in its oscillation to limit the swing of the cross bars in that direction. 1

7. In an apparatus of the class described, comprising a casing, filtering elements contained therein, and a press adapted to be moved to contact with said filtering elements and actuated by rack bars, meshing with gearing mounted upon a shaft in the frame of the machine, means for moving the rack bars, comprising a multiple gearing mounted upon the frame of the machine and provided with a pawl and ratchet, the former having a handle whereby it may be released to ermit of the reverse movement of the rac bars when desired.

8. In an apparatus of the class described, comprising a casing, filtering elements contained therein and a press adapted to be moved to contact with said elements, a perforated press plate, provided with an indented or corrugated surface, whereby there is formed on the surface of the compressed ulp ridges'and depressions and means, as a ling rim, for temporarily retaining the pulp while being compressed.

9. In an apparatus of theclass described, comprising a casing, filtering elements contained therein, and a press adapted to be moved to contact with said elements, a perforated press plate provided with means for grooving or indenting the surface of the compressed pulp, consisting of a ring secured to the lower surface of the plate.

10. In an apparatus of the class described, comprising a casing, filtering elements contained therein and a press adapted to be moved in contact with said elements, a perforated press plate provided with means for forming ridges or indentations in the surface of the compressed pulp and means as a filling rim for temporarily retaining the pulp While in presence of two witnesses.

CHARLES H. LOEW.

Witnesses MAY HUGHES,

ALAN MODONNELL. I i 

